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Title:

Laboratory and Field Evaluation of Cold-in-Place RAP Recycling

Accession Number:

01475707

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 United States

Abstract:

Cold in-place recycling (CIR) is a viable pavement rehabilitation technique that recycles 100% of the reclaimed asphalt pavement (RAP) in situ, without heat. Six test sections were constructed on a heavy traffic road in the south of Brazil using CIR with cement and cationic slow set polymer modified emulsion (CSS-1P). Different thickness of the recycled layer (80mm, 110mm, and 150mm) and two types of asphalt surface layers (HMA and Microsurfacing) were investigated. The RAP was sampled during the recycling operations and brought to the laboratory for its characterization and further mechanical tests evaluation (tensile strength, moisture sensitivity, and triaxial resilient modulus). Field samples were obtained from the test sections to evaluate the performance of recycled mixture. They were tested for rutting resistance (Laboratoire Central des Ponts et Chausées (LCPC) wheel tracking test) and indirect tensile resilient modulus. Structural evaluation of the test sections were performed through the falling weight deflectometer (FWD) in different seasons of the year. It was observed a decrease in the modulus of the recycled layers during the rainy season, in comparison with the dry season results. The laboratory tests also indicated a moderate moisture sensitivity material. The backcalculated resilient moduli of the CIR layer presented the same order of magnitude of the moduli obtained in the laboratory tests. The CIR presented reduced permanent deformation in the laboratory and low rutting in the field after two years of the rehabilitation.

Supplemental Notes:

This paper was sponsored by TRB committee AFD70 Pavement Rehabilitation.

Monograph Accession #:

01470560

Report/Paper Numbers:

13-4178

Language:

English

Corporate Authors:

Transportation Research Board

500 Fifth Street, NW
Washington, DC 20001 United States

Authors:

Marcandali da Silva, Amanda Helena
Vasconcelos, Kamilla L
Aranha, Ana Luisa
Bernucci, Liedi Bariani
Chaves, José Mario

Pagination:

16p

Publication Date:

2013

Conference:

Transportation Research Board 92nd Annual Meeting

Location: Washington DC, United States
Date: 2013-1-13 to 2013-1-17
Sponsors: Transportation Research Board

Media Type:

Digital/other

Features:

Figures; References; Tables

Geographic Terms:

Brazil

Subject Areas:

Environment; Highways; Maintenance and Preservation; Materials; Pavements; I15: Environment; I31: Bituminous Binders and Materials; I60: Maintenance

Source Data:

Transportation Research Board Annual Meeting 2013 Paper #13-4178

Files:

TRIS, TRB, ATRI

Created Date:

Feb 5 2013 12:48PM